There's nothing like an all-inclusive holiday in Serengeti to refresh you, especially when you know what to expect from the elements. Here's some information to help you decide when to book: The hottest months are usually October and September, with an average temperature of 23°C, while the coldest months are May and January, with an average of 21°C. July and August are the driest months, while April and November are the rainiest months.